MEXICO CITY (Reuters) - Mexican billionaire Carlos Slim's America Movil said on Monday it was auditing its Guatemalan unit after an investigation in the country raised questions about payments made by a former executive at the telecoms company.

MEXICO CITY (Reuters) - Mexican billionaire Carlos Slim's America Movil said on Monday it was auditing its Guatemalan unit after an investigation in the country raised questions about payments made by a former executive at the telecoms company.